SPECIFICATIONS
Range
pH
0.00÷14.00
Temperature
0.0÷60.0°C or 32.0÷140.0°F
Resolution
pH
0.01pH
Temperature
0.1°C or 0.1°F
Accuracy
pH
±0.01pH
(@20°C/68°F)Temperature
±0.5°C or ±1°F
Typical EMC
pH
±0.3pH
Deviation
Temperature
±1°C or ±1°F
Temperature
Automatic
Compensation
pH Calibration
1 or 2 point with auto-buffer recognition
pH 4.01/7.01/10.01 or pH 4.01/6.86/9.18
Probe
HI 1291
pH/temperature probe (included)
Battery Type/Life
4 x 1.5V AAA with BEPS / 500 hours
Environment
0 to 50°C (32 to 122°F); RH 100%
Dimensions
143x80x38mm (5.6x3.2x1.5”)
HI 991000
Instruction Manual
Portable pH Meter
ppm ppt µS pH
!
A T C
%
CAL
- +
°C
°F
Primary
display
Secondary
display
Selectable
temperature
unit
Stabilty
indicator
Battery
percentage
Low battery
indicator
PRINTED IN PORTUGAL IS991000R1 05/99
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Battery replacement
The meter displays the remaining percentage when turned
on. When the battery level is below 5%, the
- +
symbol on
the bottom left of the LCD lights up to indicate a low battery
condition. If the battery level is low enough to cause
erroneous readings, the Battery Error Prevention System
(BEPS) turns the
HI 991000
off.
To ensure a watertight seal, the batteries are accessed by
separating the front and back halves of the meter. The
4 Philips-head screws are located on the 4 corners of the
back of the meter. Once the back has been removed,
carefully replace the 4 AAA batteries located in the battery
compartment, paying attention to their polarity. Re-attach
the back, making sure that the gasket is in place.
Calibration solutions
HI 77400P
pH 4.01 & 7.01 (20 mL, 5 pcs each)
HI 770710P
pH 7.01 & 10.01 (20 mL, 5 pcs each)
HI 70004P
pH 4.01 calibration solution (20 mL, 25 pcs)
HI 70006P
pH 6.86 calibration solution (20 mL, 25 pcs)
HI 70007P
pH 7.01 calibration solution (20 mL, 25 pcs)
HI 70009P
pH 9.18 calibration solution (20 mL, 25 pcs)
HI 70010P
pH 10.01 calibration solution (20 mL, 25 pcs)
Other accessories
HI 710007
Protective rubber boot
HI 991000
is in compliance with the CE directives
EN 50081-1 and 50082-1
